Java tutorial
//package com.java2s; import android.bluetooth.BluetoothAdapter; public class Main { public static boolean isBluetoothOpen() throws Exception { int bluetoothStateCode = getBluetoothState(); return bluetoothStateCode == BluetoothAdapter.STATE_ON || bluetoothStateCode == BluetoothAdapter.STATE_TURNING_ON ? true : false; } public static int getBluetoothState() throws Exception { BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); if (bluetoothAdapter == null) { throw new Exception("bluetooth device not found!"); } else { return bluetoothAdapter.getState(); } } }